JP2007200109A - Electronic equipment and usb equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide electronic equipment capable of preventing impairment of portability even if connected with USB equipment, and to provide the USB equipment. <P>SOLUTION: This electronic equipment 1 has: a device body processing information inputted from the connected USB equipment 9; and a casing 2 storing the device body inside it. The peripheral face of the casing 2 is formed with a step part 21B1 recessed toward the inside of the casing 2, and the step part 21B1 is provided with a USB connection terminal 21B2 connected with the USB equipment 9 along a face 21B of the casing 2 formed with the step part 21B1. Thereby, when connecting the USB equipment 9 to the USB connection terminal 21B2, the USB equipment 9 is stored in the step part 21B1, so that it is suppressed that the USB equipment 9 is a hindrance during carrying the electronic equipment 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic device including a device main body that processes information input from a connected USB device, a housing that houses the device main body, and a USB device used in the electronic device.

  Conventionally, as an electronic device, a light source, a light modulation device that modulates a light beam emitted from the light source to form an optical image, a device main body having a projection optical system that projects the formed optical image, and the device main body There is known a projector provided with a housing for storing the inside. Such a projector is configured to form an optical image corresponding to image information input from the outside and to project the optical image onto a screen or the like by a projection optical system.

  As such a projector, a projector that can be connected to a device that outputs image information has been proposed (for example, see Patent Document 1). In the projector described in Patent Document 1, a plurality of connection terminals (connectors) are provided on an interface exposed on the rear side of the housing, and each device is connected to the connection terminals via a cable or the like. Then, the projector forms and projects an optical image corresponding to the image information input from each device.

  Here, many devices that output information such as image information as described above have been proposed, and in particular, the frequency with which small and portable USB (Universal Serial Bus) devices are used is increasing. As such a USB device, not only a USB device that stores image information and the like as a file, but also a USB device including a module that can be connected to other devices by communication. As such portable USB devices, many USB devices that can be directly connected to a connection terminal of a projector without using a cable or the like have been proposed.

JP 2003-215702 A (page 4, FIG. 2)

In recent years, projectors have become smaller and lighter, and instead of being installed at a predetermined location, a projector is often carried and used at a desired location. Here, when the projector is carried, when the small USB device that can be directly connected is connected to the connection terminal that is provided in the projector described in Patent Document 1 and is exposed on the outer surface, the USB device protrudes from the projector. End up. For this reason, when trying to carry the projector with the USB device connected, there is a problem that the USB device becomes an obstacle and the portability of the projector is lowered.
Such problems are not limited to projectors, but also in electronic devices such as notebook PCs (Personal Computers) equipped with USB connection terminals and portable printers that can directly print image information stored in USB devices. It is a problem that occurs.

  An object of the present invention is to provide an electronic device and a USB device that can prevent portability from being impaired even when the USB device is connected.

  In order to achieve the above-described object, an electronic device of the present invention is an electronic device including a device main body that processes information input from a connected USB device, and a housing that houses the device main body. A stepped portion is formed on the outer peripheral surface of the housing so as to be recessed toward the inside of the housing, and the USB is formed along the surface of the housing on which the stepped portion is formed. A USB connection terminal to which a device is connected is provided.

  According to the present invention, a stepped portion is formed in the casing constituting the electronic device, and the USB connection terminal to which the USB device is connected is provided at the stepped portion. For this reason, in a state where the USB device is connected to the USB connection terminal along the housing, the USB device is accommodated in the stepped portion. According to this, it is possible to prevent the USB device connected to the USB connection terminal from protruding from the electronic device. Therefore, even when a USB device is connected, it is possible to prevent the USB device from being in the way when the electronic device is transported, so that the portability of the electronic device can be prevented from being impaired.

In the present invention, it is preferable that a side wall extending along a connection direction of the USB device is formed on the outer peripheral surface of the casing on which the step portion is formed so as to be adjacent to the step portion. .
According to the present invention, since the side wall is formed on the surface of the step portion along the connection direction of the USB device, the USB device can be protected when the USB device is connected to the USB connection terminal. , It is possible to prevent the USB device from being accidentally dropped. In addition, when the height from the step portion of the side wall is higher than the height from the step portion of the USB device connected to the USB connection terminal, not only can the USB device be protected more reliably, but the USB device can be protected from the housing. Protruding can be reliably prevented. Therefore, it can prevent more reliably that the portability of an electronic device is impaired.

In the present invention, it is preferable that a fixing unit that fixes the USB device connected to the USB connection terminal is provided.
According to the present invention, the fixing device can fix the USB device in a state of being connected to the USB connection terminal. According to this, it is possible to reliably prevent the USB device from falling off the electronic device during transportation of the electronic device. Therefore, it is possible to prevent the portability of the electronic device from being damaged by the connection of the USB device.

In this invention, it is preferable that the said level | step-difference part is formed in the position where the temperature of the said apparatus main body is the lowest.
Here, many USB devices include a semiconductor or the like inside, and the USB device itself generates heat while the USB device is being used. If heat is applied to such a USB device from the outside, a malfunction may occur and the USB device may not be used normally.
On the other hand, in this invention, the level | step-difference part is formed in the position where temperature is the lowest among the apparatus main bodies which comprise an electronic device. According to this, it is possible to reduce the influence of heat generated in the electronic device on the USB device connected to the USB connection terminal. Accordingly, malfunction of the USB device connected to the electronic device can be suppressed.

In the present invention, the electronic device is a projector including a light source, a light modulation device that modulates a light beam emitted from the light source to form an optical image, and a projection optical system that projects the formed optical image. Preferably there is.
According to the present invention, even when a USB device that stores image information such as an image file or a USB device that includes a module that can communicate with other devices is connected to a projector as an electronic device, portability is impaired. It is possible to carry the projector without any trouble. Therefore, the projector can be easily carried and the portability of the projector can be prevented from being impaired.

In this invention, it is preferable that the said level | step-difference part is formed in the surface of the said housing | casing of the side along the projection direction of the optical image by the said projection optical system, and the side close | similar to the said projection optical system.
Here, when the electronic apparatus is configured as a projector, the projection optical system for enlarging and projecting an optical image requires a certain length, and the projection optical system itself generates little heat. The surface of the casing on the side close to the projection optical system, which is a surface along the projection direction, is the lowest temperature position in the electronic device. For this reason, in the present invention, the stepped portion is formed on the surface of the casing along the projection direction of the optical image by the projection optical system, so that the USB device connected to the USB connection terminal is generated in the electronic device. Heat conduction can be suppressed. Therefore, malfunction of the USB device connected to the USB connection terminal of the electronic device configured as a projector can be further suppressed.

Further, the USB device of the present invention is used in an electronic device including a casing having a stepped portion immersing inward and a USB connection terminal provided in the stepped portion, and is connected to the USB connection terminal. The USB device is characterized by having a shape along the housing when connected to the USB connection terminal.
According to the present invention, the same effects as those of the above-described electronic device can be achieved.
That is, when the USB device of the present invention is connected to the USB connection terminal provided in the step portion of the casing of the electronic device, the USB device is housed in the step portion. Moreover, since the USB device has a shape that matches the shape of the casing of the electronic device when connected to the USB connection terminal, the USB device can be reliably prevented from protruding from the electronic device. . Therefore, the portability of the electronic device can be prevented from being impaired even when the USB device is connected.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(1) Configuration of Projector 1 FIG. 1 is a schematic diagram showing an internal configuration of the projector 1 according to the present embodiment.
The projector 1 forms an optical image corresponding to input image information and enlarges and projects the optical image on a screen or the like. As shown in FIG. 1, the projector 1 includes an exterior housing 2 and a device main body 3 accommodated in the exterior housing 2. Further, the projector 1 can be connected to the USB device 9 along the projection direction on the side surface along the projection direction of the optical image by the projection lens 46 described later and on the side surface close to the projection lens 46. It is configured.

(2) Configuration of Device Main Body 3 The device main body 3 executes the main functions of the projector 1 and is housed in the exterior housing 2 as described above. The apparatus main body 3 includes an optical unit 4 that forms an optical image, a control unit 5 that controls the operation of the apparatus main body 3, a power supply unit 6 that supplies driving power to each electronic component that constitutes the apparatus main body 3, and these And a cooling unit 7 for cooling the apparatus.

The optical unit 4 is a unit that forms an optical image (color image) corresponding to image information by optically processing the light beam emitted from the light source under the control of the control unit 5 described later. The optical unit 4 extends along the back surface of the exterior housing 2 and has a substantially L shape in plan view that extends along the side surface of the exterior housing 2.
The optical unit 4 includes an illumination optical device 41, a color separation optical device 42, a relay optical device 43, an electro-optical device 44, and an optical component housing 45 in which the optical components 41 to 44 are housed. And a projection lens 46 supported and fixed at a predetermined position by the optical component casing 45.

  The illumination optical device 41 is an optical system for illuminating an image forming area of a later-described liquid crystal panel 441 constituting the electro-optical device 44 substantially uniformly. The illumination optical device 41 includes a light source device 411, a first lens array 412, a second lens array 413, a polarization conversion element 414, and a superimposing lens 415.

  The light source device 411 includes a light source lamp 416 that emits a radial light beam, a reflector 417 that reflects the emitted light emitted from the light source lamp 416 and converges it at a predetermined position, and a light beam converged by the reflector 417 as illumination light. And a collimating concave lens 418 that is parallel to the axis A. As such a light source lamp 416, a halogen lamp, a metal halide lamp, or a high-pressure mercury lamp can be used. In addition, the reflector 417 can be composed of an ellipsoidal reflector having a rotational ellipsoid, and can also be composed of a parabolic reflector having a rotational paraboloid. In this case, the collimating concave lens 418 can be omitted.

The first lens array 412 has a configuration in which small lenses having a substantially rectangular outline when viewed from the optical axis direction are arranged in a matrix. Each small lens splits the light beam emitted from the light source device 411 into a plurality of partial light beams.
The second lens array 413 has a configuration similar to that of the first lens array 412, and has a configuration in which small lenses are arranged in a matrix. The second lens array 413 is
The image emitted from each small lens of the first lens array 412 together with the superimposing lens 415 arranged in the latter stage of the optical path of the second lens array 413 is connected to an image forming area of a liquid crystal panel 441 described later of the electro-optical device 44. It has a function to image.

The polarization conversion element 414 is disposed between the second lens array 413 and the superimposing lens 415, and converts light from the second lens array 413 into substantially one type of linearly polarized light.
Specifically, each partial light converted into substantially one type of linearly polarized light by the polarization conversion element 414 is finally superimposed on an image forming area of a liquid crystal panel 441 described later by a superimposing lens 415. In a projector using a liquid crystal panel of a type that modulates polarized light, only one type of polarized light can be used, and therefore approximately half of the light from the light source device 411 that emits randomly polarized light cannot be used. For this reason, by using the polarization conversion element 414, the light emitted from the light source device 411 is converted into substantially one type of linearly polarized light, and the light use efficiency in the electro-optical device 44 is increased.

The color separation optical device 42 includes two dichroic mirrors 421 and 422 and a reflection mirror 423, and a plurality of partial light beams emitted from the illumination optical device 41 by the dichroic mirrors 421 and 422 are red, green, and blue. It has a function of separating into colored light.
The relay optical device 43 includes an incident side lens 431, a relay lens 433, and reflection mirrors 432 and 434, and has a function of guiding the red light separated by the color separation optical device 42 to the liquid crystal panel 441 (441R) for red light. Have.

  At this time, the dichroic mirror 421 of the color separation optical device 42 transmits the red light component and the green light component of the light beam emitted from the illumination optical device 41 and reflects the blue light component. The blue light reflected by the dichroic mirror 421 is reflected by the reflection mirror 423, passes through the field lens 419, and reaches the blue light liquid crystal panel 441 (441B). The field lens 419 converts each partial light beam emitted from the second lens array 413 into a light beam parallel to the central axis (principal ray). The same applies to the field lens 419 provided on the light incident side of the liquid crystal panel 441 (441G, 441R) for green light and red light.

  Of the red light and green light transmitted through the dichroic mirror 421, the green light is reflected by the dichroic mirror 422 and passes through the field lens 419 to reach the liquid crystal panel 441 (441G) for green light. On the other hand, the red light passes through the dichroic mirror 422, passes through the relay optical device 43, and further passes through the field lens 419 to reach the red light liquid crystal panel 441 (441R). The reason why the relay optical device 43 is disposed on the optical path of red light is that the length of the optical path of red light is longer than the length of the optical path of other color lights, and therefore the efficiency of light utilization due to light diffusion or the like is increased. This is to prevent the decrease. That is, this is to transmit the partial light beam incident on the incident side lens 431 to the field lens 419 as it is. The relay optical device 43 is configured to pass red light out of the three color lights, but is not limited thereto, and may be configured to pass blue light, for example.

  The electro-optical device 44 modulates the three color lights emitted from the color separation optical device 42 according to image information, and combines the modulated color lights to form an optical image (color image). The electro-optical device 44 includes three liquid crystal panels 441 as light modulators (441 R for the red light liquid crystal panel, 441 G for the green light liquid crystal panel, and 441 B for the blue light liquid crystal panel). Three incident-side polarizing plates 442 disposed on the light beam incident side of the liquid crystal panel 441, three viewing angle compensation plates 443 disposed on the light beam emission side of each liquid crystal panel 441, and three viewing angle compensation plates 443, respectively. 3 is provided with three exit-side polarizing plates 444 disposed on the light-emission side of each and a cross dichroic prism 445 as a color synthesizing optical device.

Among these, the incident-side polarizing plate 442 receives light of each color whose polarization direction is aligned in substantially one direction by the polarization conversion element 414. Of the incident light beams, the polarization axis of the light beams aligned by the polarization conversion element 414. And transmits only polarized light in substantially the same direction and absorbs other light beams. The incident-side polarizing plate 442 has a configuration in which a polarizing film is pasted on a translucent substrate such as sapphire glass or quartz.
The liquid crystal panel 441 has a configuration in which a liquid crystal, which is an electro-optical material, is hermetically sealed between a pair of transparent glass substrates, and the orientation of the liquid crystal in the image forming area according to a drive signal input from the control unit 5 described later. The state is controlled, and the polarization direction of the polarized light beam emitted from the incident-side polarizing plate 442 is modulated to form a color image corresponding to the incident color light.

The viewing angle compensation plate 443 is formed in a film shape, and when the light beam is obliquely incident on the liquid crystal panel 441 (inclined with respect to the normal direction of the light beam incident surface of the liquid crystal panel 441), the liquid crystal panel 441 is concerned. The phase difference generated between the ordinary light and the extraordinary light due to the birefringence generated in the above is compensated. The viewing angle compensation plate 443 is an optical anisotropic body having negative uniaxiality, and the optical axis is oriented in a predetermined direction within the film surface and oriented so as to be inclined by a predetermined angle from the film surface in the out-of-plane direction. is doing.
The viewing angle compensator 443 can be constituted by, for example, a disc-like (disk-shaped) compound layer formed on a transparent support such as triacetyl cellulose (TAC) through an alignment film, and a WV film (Fuji Photo Film Co., Ltd.) can be used.

The exit-side polarizing plate 444 transmits only a light beam having a polarization axis perpendicular to the transmission axis of the light beam in the incident-side polarizing plate 442 out of the light beam emitted from the liquid crystal panel 441 and passing through the viewing angle compensation plate 443, and the other light beams. It absorbs.
The cross dichroic prism 445 is an optical element that forms an optical image (color image) by synthesizing each color light as a color image emitted from the emission side polarizing plate 444. The cross dichroic prism 445 has a square shape in plan view in which four right angle prisms are bonded together, and two dielectric multilayer films are formed on the interface where the right angle prisms are bonded together. These dielectric multilayer films transmit the color light through the exit-side polarizing plate 444 disposed on the side facing the projection lens 46 (G color light side), and the remaining two exit-side polarizing plates 444 (R color light side and B color). Reflects colored light via the colored light side). In this manner, the color lights modulated by the incident-side polarizing plates 442, the liquid crystal panels 441, the viewing angle compensation plates 443, and the emission-side polarizing plates 444 are combined to form a color image.

The optical component housing 45 is a box-shaped member made of a synthetic resin, in which a predetermined illumination optical axis A is set, and the optical components 41 to 44 described above are arranged at predetermined positions with respect to the illumination optical axis A. Although not shown in detail in the optical component casing 45, a plurality of grooves for positioning and fixing the optical components 41 to 44 are formed.
The projection lens 46 has a function as a projection optical system that enlarges and projects an optical image (color image) formed by the optical components 41 to 44 on a screen (not shown). The projection lens 46 is configured as a combined lens in which a plurality of lenses are housed in a cylindrical lens barrel.

  The control unit 5 is configured as a circuit board on which a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like are mounted. The control unit 5 processes image information input from a connection terminal (not shown) exposed on the outer surface of the exterior housing 2 to control the driving of the liquid crystal panel 441 of the optical unit 4, and the light source of the light source device 411. The drive control of the entire apparatus main body 3 is performed such as lighting control of the lamp 416. The control unit 5 is electrically connected to a USB connection terminal 21B2 (see FIGS. 3 to 5), which will be described later, and processes information input from the USB device 9 connected to the USB connection terminal 21B2.

The power supply unit 6 supplies electric power to each electronic component constituting the projector 1, and is not shown in detail, but includes a power supply block and a light source drive block.
Among these, the power supply block converts the commercial alternating current input via a power supply cable (not shown) into a direct current, boosts and reduces the voltage to a voltage corresponding to each electronic component, and then each of the light source drive block, the control unit 5 and the like. Supply to electronic components.
The light source drive block rectifies and transforms the direct current supplied from the power supply block, generates an alternating current rectangular wave current, supplies the alternating current rectangular wave current to the light source lamp 416 of the light source device 411, and the light source lamp 416. Is a circuit board that lights up. The light source drive block is electrically connected to the control unit 5 described above, and lighting control of the light source lamp 416 is performed by the control unit 5 through the light source drive block.

  The cooling unit 7 is taken from the outside of the exterior housing 2 and discharges the air that has cooled the optical unit 4, the control unit 5, and the power supply unit 6 to the outside. The cooling unit 7 includes a cooling fan, and driving control of the cooling fan is performed by the control unit 5. Such a cooling fan can be constituted by an axial fan that takes in and discharges air along the rotation axis direction by rotating the fan around the rotation axis. It is also possible to configure with a centrifugal fan (sirocco fan) that exhausts the sucked air in the rotational tangential direction.

(3) Configuration of Exterior Housing 2 FIG. 2 is a schematic perspective view showing the appearance of the projector 1. In other words, FIG. 2 is a schematic perspective view showing the exterior housing 2.
The exterior housing 2 corresponds to the housing of the present invention, and is formed of a synthetic resin or the like in a generally round rectangular shape as shown in FIG. The exterior casing 2 constitutes the top, front, back, and side surfaces of the projector 1, and the upper case 21 that constitutes the top of the exterior casing 2, and the bottom, front, back, and side surfaces of the projector 1, respectively. The upper case 21 and the lower case 22 are fixed to each other with screws or the like.
In addition, the exterior housing | casing 2 may be formed with not only a synthetic resin etc. but with another material, for example, you may comprise with a metal etc.

Among these, leg portions 221 extending downward from the bottom surface are formed at the four corners of the bottom surface of the lower case 22.
In addition, an opening 21A1 through which the projection lens 46 is exposed is formed on the front surface 21A of the upper case 21 (the surface facing the projection direction of the optical image by the projection lens 46).
Further, of the side surfaces constituting the upper case 21, the side surface 21B on the side close to the projection lens 46 extends along the projection direction of the optical image by the projection lens 46, and a USB device 9 to be described later can be mounted. A step portion 21B1 is formed.

FIG. 3 is a partially enlarged view showing a part of the exterior housing 2 in an enlarged manner. In other words, FIG. 3 is a schematic perspective view showing the step portion 21 </ b> B <b> 1 formed in the upper case 21.
As shown in FIG. 3, the step portion 21 </ b> B <b> 1 extends toward the inside of the upper case 21 and extends along the projection direction of the optical image by the projection lens 46 (arrow Z direction in FIG. 3). Thus, it is formed in the longitudinal cross-sectional view substantially concave shape. The step portion 21B1 is formed so that the dimension in the normal direction (the arrow X direction in FIG. 3) of the side surface of the exterior housing 2 is shorter than the dimension in the direction along the arrow Z direction. Further, the step portion 21B1 is notched at the end portion on the front surface 21A side, and the USB connection terminal 21B2 for connecting the USB device 9 is exposed on the rear surface surface forming the step portion 21B1. It is provided as follows.

Further, side walls 21B3 extending along the arrow Z direction are formed on the upper side (the tip side in the arrow Y direction in FIG. 3) and the lower side (the base end side in the arrow Y direction in FIG. 3) of the step portion 21B1, respectively. Has been. These side walls 21B3 are inserted into the stepped portion 21B1 to protect the USB device 9 connected to the USB connection terminal 21B2, and also function as a guide for guiding the connection of the USB device 9 to the USB connection terminal 21B2. For this reason, not only can the USB device 9 be easily connected to the USB connection terminal 21B2, but the USB device 9 does not protrude from the exterior housing 2 when the USB device 9 is connected to the USB connection terminal 21B2. Therefore, it is possible to prevent the portability of the projector 1 from being impaired.
Furthermore, a hole 21B4 penetrating vertically through the side wall 21B1 is formed in the side wall 21B3 located below the step portion 21B1. The hole 21B4 is a hole through which a screw 8 (to be described later) for fixing the USB device 9 to the step portion 21B1 is inserted.

(4) Configuration of USB Device 9 FIGS. 4 and 5 are diagrams illustrating a process of mounting the USB device 9 on the stepped portion 21B1. Specifically, FIG. 4 is a view of the stepped portion 21B1 and the USB device 9 as seen from above, and FIG. 5 is a view as seen from below. FIG. 6 is a diagram illustrating a state in which the USB device 9 is connected to the USB connection terminal 21B2. 4 and 5 are the same directions as the X, Y, and Z directions shown in FIG.
As shown in FIGS. 4 to 6, the USB device 9 is a small and portable USB device, and can be directly connected to the USB connection terminal 21B2 provided in the step portion 21B1 without using a USB connection cable. Has been. Examples of such a USB device 9 include a wireless LAN adapter having a wireless local area network (LAN) module that can be connected to an external device, and a USB memory that stores still image files and moving image files as image information. can do.

The USB device 9 includes a substantially rectangular parallelepiped device main body 91 configured to store information therein, and a terminal portion 92 that protrudes from the device main body 91 and is connected to the USB connection terminal 21B2. .
Among these, the shape of the apparatus main body 91 is formed along the upper case 21 when the terminal portion 92 is connected to the USB connection terminal 21B2. Specifically, when the USB device 9 is connected to the USB connection terminal 21 </ b> B <b> 2, the surface of the device main body 91 that is exposed to the outside is formed substantially flat so that the substantially central portion is along the side surface 21 </ b> B. The surface in the vicinity of the end opposite to the end where 92 is formed is formed to have a curved shape in accordance with the front surface 21A and the side surface 21B of the upper case 21.

  The dimension of the device main body 91 in the arrow X direction is substantially the same as the dimension of the stepped portion 21B1 in the arrow X direction, and the dimension of the device main body 91 in the arrow Y direction is substantially the same as the dimension between the side walls 21B3. It is formed to be the same. Further, the dimension of the device main body 91 in the arrow Z direction (the dimension of the USB device 9 excluding the terminal portion 92 in the arrow Z direction) is formed to be substantially the same as the dimension of the stepped portion 21B1 in the Z direction. Yes. For this reason, when the USB device 9 is connected to the USB connection terminal 21B2, the USB device 9 is housed in the step portion 21B1 and does not protrude from the upper case 21, as shown in FIG. .

  A screw hole 93 is formed on the lower surface of the device main body 91 (the surface facing the arrow Y direction in FIG. 5). A screw 8 as a fixing means inserted through a hole 21B4 formed in the lower side wall 21B3 of the upper case 21 and a hole 222 formed in the bottom surface of the lower case 22 is screwed into the screw hole 93. That is, after the USB device 9 is connected to the USB connection terminal 21B2, the USB device 9 is screwed to the exterior housing 2 by screwing the screw hole 93 and the screw 8 through the hole 21B4 and the hole 222. be able to. Accordingly, even when the USB device 9 is connected to the projector 1 and the projector 1 is transported, the USB device 9 does not come off, so that the USB device 9 can be prevented from being damaged. On the contrary, the ease of transport can be improved without impairing the portability of 1.

(5) Formation Position of Stepped Part 21B1 Here, the formation position of the stepped part 21B1 in the upper case 21 will be described.
As described above, the step portion 21B1 is formed on the side surface 21B that is a side surface along the projection direction of the optical image by the projection lens 46 and that is close to the projection lens 46 among the surfaces constituting the upper case 21. Has been. The position where the stepped portion 21B1 is formed on the side surface 21B is the lowest temperature position in the projector 1.

  More specifically, in the apparatus main body 3, the optical unit 4, the control unit 5, and the power supply unit 6 are each a heat source, and in particular, the light source lamp 416 constituting the optical unit 4 is the largest heat source. For this reason, when the USB device 9 is connected to the projector 1, if the USB device 9 is not connected to a position away from these heat sources, the USB device 9 may malfunction due to the influence of heat from the heat sources. There is sex. In particular, when the projector 1 has a configuration in which the USB device 9 is accommodated in the stepped portion as in the present embodiment, heat may be conducted from the exterior housing 2 to the USB device 9. In such a case, the USB device 9 Is likely to malfunction. Therefore, it is necessary to arrange the stepped portion in which the USB device 9 is accommodated at the lowest temperature position in the exterior housing.

  Here, from the arrangement positions of the units 4, 5, 6, and 7 shown in FIG. 1, positions where the temperature is high in the projector 1 are the vicinity of the light source device 411, the vicinity of the electro-optical device 44, Near the power supply unit 6 and the cooling unit 7. Further, the position where the cooling unit 7 is disposed requires an opening for discharging the air inside the exterior housing 2 to the outside, and it becomes difficult to provide a USB connection terminal for connecting the USB device 9. For this reason, the position of the side surface 21 </ b> B along the projection lens 46 and close to the projection lens 46, which is the position where the influence of heat of the optical unit 4, the control unit 5, the power supply unit 6 and the cooling unit 7 is the lowest. However, the projector 1 has the lowest temperature. The step 21B1 is formed at a position corresponding to the projection lens 46 on the side surface 21B, and the USB connection terminal 21B2 is provided on the step 21B1, so that the influence of heat generated in the projector 1 on the USB device 9 is the most. Can be small. Accordingly, it is possible to suppress the malfunction of the USB device 9 connected to the USB connection terminal 21B2.

According to the projector 1 of the present embodiment as described above, the following effects can be obtained.
That is, a stepped portion 21B1 that is recessed toward the inside is formed on the side surface 21B of the exterior casing 2 constituting the projector 1, and the USB device 9 is connected to the stepped portion 21B1 along the stepped portion 21B1. A connection terminal 21B2 is provided. According to this, when the USB device 9 is connected to the USB connection terminal 21B2, it is possible to prevent the USB device 9 from unnecessarily protruding from the upper case 21. Therefore, when the projector 1 is transported, the USB device 9 can be prevented from getting in the way, so that the portability of the projector 1 can be prevented from being impaired.

The side surface 21B of the upper case 21 where the step portion 21B1 is formed is adjacent to the step portion 21B1 and along the connection direction of the USB device 9 to the USB connection terminal 21B2 provided in the step portion 21B1. A side wall 21B3 is provided. According to this, since the connection of the USB device 9 to the USB connection terminal 21B2 is guided, the USB device 9 can be easily connected.
In addition, since the USB device 9 is protected by the side wall 21B3, not only can the USB device 9 be prevented from being accidentally dropped, but also the protrusion of the USB device 9 from the upper case 21 can be further suppressed. . Therefore, the portability of the projector 1 in a state where the USB device 9 is connected can be improved.
Furthermore, in the present embodiment, the side wall 21B3 is formed on the upper side and the lower side of the step portion 21B1 so as to sandwich the step portion 21B1. According to this, the USB device 9 can be more easily inserted into the USB connection terminal 21B2, and the USB device 9 can be reliably protected.

Further, the step portion 21B1 provided with the USB connection terminal 21B2 is formed on the side surface 21B close to the projection lens 46 in the upper case 21. According to this, since the position where the step portion 21B1 is formed is the lowest temperature position in the projector 1, the heat generated in the projector 1 is conducted to the USB device 9 connected to the USB connection terminal 21B2. Thus, adverse effects on the USB device 9 can be prevented. Therefore, malfunction of the USB device 9 can be prevented.
Further, since the USB device 9 is connected to the USB connection terminal 21B2 along the direction opposite to the projection direction of the optical image by the projection lens 46, it prevents the projection of the optical image by the projection lens 46 from being hindered. be able to. For this reason, it is possible to suppress the restriction on the position of the projection lens 46, so that the degree of freedom in designing the projector 1 can be improved.

  Furthermore, the USB device 9 connected to the USB connection terminal 21B2 has a shape corresponding to the shape of the upper case 21 when connected to the USB connection terminal 21B2. According to this, since the USB device 9 hardly protrudes from the upper case, even if the projector 1 is transported in a state where the USB device 9 is connected, it is possible to prevent the USB device 9 from being in the way. Therefore, the portability of the projector 1 can be further improved.

(6) Modifications of Embodiments The present invention is not limited to the above-described embodiments, but includes modifications and improvements as long as the object of the present invention can be achieved.
For example, in the above embodiment, the side wall 21B3 is formed above and below the step portion 21B1 along the insertion direction of the USB device 9 into the step portion 21B1 so as to sandwich the step portion 21B1. The invention is not limited to this. That is, the side wall 21B3 may be formed only on one side (for example, the lower side) of the stepped portion 21B1, or may not be formed.
If the side wall 21B3 extending along the insertion direction of the USB device 9 is formed at one end of the step portion 21B1 in the insertion direction, the side wall 21B3 is connected to the USB connection terminal 21B2 provided at the step portion 21B1. The connected USB device 9 can be protected during the transportation of the projector 1. Further, since the side wall 21B3 is formed below the step portion 21B1, the insertion of the USB device 9 into the USB connection terminal 21B2 is guided, so that the USB device 9 can be connected more easily.

  In the embodiment, the dimension in the arrow X direction (see FIGS. 3 to 5) from the bottom surface of the stepped portion 21B1 of the side wall 21B3 is substantially the same as the dimension in the arrow X direction of the device main body 91 of the USB device 9. However, the present invention is not limited to this. Note that the USB device 9 may protrude from the upper case 21 when the dimension in the arrow X direction from the bottom surface of the stepped portion 21B1 of the side wall 21B3 is larger than the dimension in the arrow X direction of the device main body 91. The portability of the projector 1 can be improved.

  In the embodiment, the step portion 21B1 is formed on the side surface 21B close to the projection lens 46 among the side surfaces along the projection direction of the optical image by the projection lens 46. However, the projection of the optical image by the projection lens 46 is performed. As long as the stepped portion is formed at a position that does not block the discharge of the cooling air by the cooling unit 7, the formation position of the stepped portion is not limited. Furthermore, although the position on the side surface 21B where the step portion 21B1 is formed is a position corresponding to the projection lens 46, the present invention is not limited to this.

  In the embodiment, the step portion 21B1 is formed on the side surface 21B of the upper case 21 so as to extend along the projection direction of the optical image by the projection lens 46 (Z direction in FIGS. 3 to 5). However, the present invention is not limited to this. For example, you may form so that it may extend in the direction orthogonal to the said projection direction, for example, the X direction or the Y direction in FIGS.

  In the above-described embodiment, the configuration in which the optical unit 4 has a substantially L shape in plan view has been described. However, the configuration is not limited thereto, and for example, a configuration having a substantially U shape in plan view may be employed.

In the above-described embodiment, the transmissive liquid crystal panel 441 having a different light beam incident surface and light beam emission surface is used. However, a reflective liquid crystal panel having the same light incident surface and light emission surface may be used.
Furthermore, although three liquid crystal panels 441R, 441G, and 441B are used in the projector 1 of the embodiment, the present invention is not limited to this. That is, the present invention can also be applied to a projector using two, or four or more liquid crystal panels.

  In the above-described embodiment, the projector 1 including the liquid crystal panel 441 is exemplified as the light modulation device. However, the light modulation device that modulates the incident light beam according to the image information to form an optical image has other configurations. A modulation device may be employed. For example, the present invention can also be applied to a projector using a light modulation device other than the liquid crystal layer, such as a device using organic EL (ElectroLuminescence) or a micromirror. When such a light modulation device is used, the polarizing plates 442 and 444 on the light beam incident side and the light beam emission side can be omitted.

  In the above-described embodiment, the projector 1 is described as an electronic apparatus in which the USB connection terminal 21B2 is provided and the stepped portion 21B1 is formed. However, the present invention is not limited to this. That is, the electronic device having a USB connection terminal may have another configuration. For example, the present invention can be applied to a PC (Personal Computer), a printer, or the like. In particular, in the case of an electronic device that is assumed to be carried, such as a notebook PC, by applying the present invention, it is possible to prevent the portability of the electronic device from being impaired even when the USB device is connected.

  The present invention can be used for a projector, and includes an electronic device, in particular, a USB connection terminal to which a USB device can be connected. For example, an electronic device that can be used by being carried around such as a notebook PC or a portable printer. Can be suitably used.

1 is a schematic diagram showing an internal configuration of a projector according to an embodiment of the invention. FIG. 2 is a schematic perspective view showing an appearance of a projector in the embodiment. The outline perspective view which expands and shows the level | step-difference part of the exterior housing | casing in the said embodiment. The outline perspective view which looked at the level difference part and USB apparatus in the embodiment from the upper part. The outline perspective view which looked at the level difference part and USB apparatus in the above-mentioned embodiment from the lower part. FIG. 2 is a schematic perspective view showing a step portion and a USB device in the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector (electronic device), 2 ... Exterior housing | casing (housing | casing), 3 ... Apparatus main body, 8 ... Screw (fixing means), 9 ... USB apparatus, 46 ... Projection lens (projection optical system), 21B ... Side surface ( (Outer peripheral surface of housing), 21B1... Stepped portion, 21B2... USB connection terminal, 21B3... Side wall, 416 ... light source lamp (light source), 441 (441R, 441G, 441B).

Claims (7)

An electronic device including an apparatus main body that processes information input from a connected USB device, and a housing that houses the apparatus main body.
On the outer peripheral surface of the casing, a stepped portion is formed that immerses toward the inside of the casing.
The electronic device, wherein the stepped portion is provided with a USB connection terminal to which the USB device is connected along the surface of the casing on which the stepped portion is formed. The electronic device according to claim 1,
An electronic device characterized in that a side wall extending along a connection direction of the USB device is formed on an outer peripheral surface of the casing in which the step portion is formed so as to be adjacent to the step portion. . In the electronic device according to claim 1 or 2,
An electronic device comprising: a fixing unit that fixes the USB device connected to the USB connection terminal. The electronic device according to claim 1, wherein
The electronic apparatus according to claim 1, wherein the step portion is formed at a position where the temperature of the apparatus main body is the lowest. In the electronic device in any one of Claims 1-4,
The electronic device
An electronic apparatus comprising: a light source; a light modulation device that modulates a light beam emitted from the light source to form an optical image; and a projection optical system that projects the formed optical image. The electronic device according to claim 5,
The electronic apparatus according to claim 1, wherein the step portion is formed on a surface of the casing on a side close to the projection optical system, along a surface along a projection direction of an optical image by the projection optical system. A USB device that is used in an electronic device including a housing having a stepped portion that immerses inwardly and a USB connection terminal provided in the stepped portion, and is connected to the USB connection terminal,
The USB device has a shape along the casing when connected to the USB connection terminal.

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